Grammy-winning Arcade Fire to headline Bonnaroo, despite nobody knowing who they are

APMembers of the Arcade Fire celebrate winning Album of the Year at the Grammys on Sunday.

Don't go calling them mainstream just yet. It may relieve longtime fans of the Arcade Fire, who scored a surprising Album of the Year win at the Grammys on Sunday for "The Suburbs," to know that the beloved Canadian indie-rock ensemble still floats well below the radar for much of the general public.

For (completely anecdotal) evidence, look no further than the amusing micro-blog Who Is Arcade Fire, which has been collecting postings from Twitter and Facebook expressing shock, confusion and outrage over the night's biggest award going to an artist that isn't completely ubiquitous.

"Who in the hell were those suburbs people who won album of the year???? Omg really??? I'm pissed!," reads one of the least profane and most grammatically correct entries from the site.

TV's Dog the Bounty Hunter weighed in with this: "It's a weird world we live in when someone called Arcade Fire can win a Grammy n Justin Bieber doesn't!"

Indeed it is. Now, to be fair, the Grammys being a step ahead of mainstream culture is something that has happened, give or take, zero times in the award show's history, so you can forgive some viewers for being taken aback. (Arcade Fire did have a chart-topping album, a Super Bowl ad and a sold-out stint at Madison Square Garden, but whatever.)

Those upset people will do well to avoid this year's Bonnaroo festival in Manchester, Tenn., which this morning announced that the headliners for its annual June camp-in event will be Arcade Fire, Buffalo Springfield, Widespread Panic and another little-known Grammy-winning artist named Eminem.